<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>参数列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 警告消息区域 -->
            <el-alert
            show-icon
            title="注意：搞快点！"
            type="warning"
            :closable="false">
            </el-alert>

            <!-- 选择商品分类区域 -->
            <el-row class="cat_opt">
                <el-col>
                    <span>
                        选择商品分类:
                    </span>
                     <el-cascader
                    :options="catelist"
                    :props="cateProps"
                    @change="hangleChange"
                    v-model="selectedCateKeys"></el-cascader>
                </el-col>
            </el-row>

            <!-- tab页签区域 -->
             <el-tabs v-model="activeName" @tab-click="handleTabClick">
                <!-- 添加动态参数的面板 -->
                <el-tab-pane label="动态参数" name="many">
                    <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加参数</el-button>
                    <!-- 动态参数表格 -->
                    <el-table :data="manyTableData" border stripe>
                        <!-- 展开行 -->
                        <el-table-column type="expand">
                            <template slot-scope="scope">
                                <!-- 循环渲染tag标签 -->
                                <el-tag 
                                v-for="(item,i) in scope.row.attr_vals" 
                                :key="i"
                                closable
                                @close="handleClose(i,scope.row)">
                                    {{item}}
                                </el-tag>
                                <!-- 新增输入的文本框 -->
                                <el-input
                                class="input-new-tag"·
                                v-if="scope.row.inputVisible"
                                v-model="scope.row.inputValue"
                                ref="saveTagInput"
                                size="small"
                                @keyup.enter.native="handleInputConfirm(scope.row)"
                                @blur="handleInputConfirm(scope.row)">
                                </el-input>
                                <!-- 添加按钮 -->
                                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope)">+ New Tag</el-button>
                            </template>
                        </el-table-column> 
                        <!-- 索引列 -->
                        <el-table-column type="index"></el-table-column>
                        <el-table-column label="参数名称" prop="attr_name"></el-table-column>
                        <el-table-column label="操作">
                            <template slot-scope="scope">
                                <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                                <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
                            </template>
                        </el-table-column>
                    </el-table>
                </el-tab-pane>
                <!-- 添加静态参数的面板 -->
                <el-tab-pane label="静态属性" name="only">
                    <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加参数</el-button>
                      <!-- 静态参数表格 -->
                    <el-table :data="onlyTableData" border stripe>\
                        <!-- 展开行 -->
                        <el-table-column type="expand">
                            <template slot-scope="scope">
                                <!-- 循环渲染tag标签 -->
                                <el-tag 
                                v-for="(item,i) in scope.row.attr_vals" 
                                :key="i"
                                closable
                                @close="handleClose(i,scope.row)">
                                    {{item}}
                                </el-tag>
                                <!-- 新增输入的文本框 -->
                                <el-input
                                class="input-new-tag"
                                v-if="scope.row.inputVisible"
                                v-model="scope.row.inputValue"
                                ref="saveTagInput"
                                size="small"
                                @keyup.enter.native="handleInputConfirm(scope.row)"
                                @blur="handleInputConfirm(scope.row)">
                                </el-input>
                                <!-- 添加按钮 -->
                                <el-button v-else class="button-new-tag" size="small" @click="showInput(scope)">+ New Tag</el-button>
                            </template>
                        </el-table-column>
                        <!-- 索引列 -->
                        <el-table-column type="index"></el-table-column>
                        <el-table-column label="属性名称" prop="attr_name"></el-table-column>
                        <el-table-column label="操作">
                            <template slot-scope="scope">
                                <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                                <el-button size="mini" type="danger" icon="el-icon-delete"  @click="removeParams(scope.row.attr_id)">删除</el-button>
                            </template>
                        </el-table-column>
                    </el-table>
                </el-tab-pane>
                
            </el-tabs>
        </el-card>

        <!--  添加参数的对话框 -->
        <!-- 计算属性动态绑定标题 -->
        <el-dialog
        :title="'添加'+titleText"
        :visible.sync="addDialogVisible"
        width="50%"
        @close="addDialogClosed">
            <el-form ref="addFormRef" 
            :model="addForm" 
            label-width="100px"
            :rules='addFormRules'>
                <el-form-item :label="titleText" prop="attr_name">
                    <el-input v-model="addForm.attr_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addParams">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 修改参数对话框 -->
        <el-dialog
        :title="'修改'+titleText"
        :visible.sync="editDialogVisible"
        width="50%"
        @close="editDialogClosed"
        >
            <el-form ref="editFormRef" 
            :model="editForm" 
            label-width="100px"
            :rules='editFormRules'>
                <el-form-item :label="titleText" prop="attr_name">
                    <el-input v-model="editForm.attr_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editParams">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return {
            catelist:[],  
            // 级联选择框配置对象
            cateProps:{
                value:'cat_id',
                label:'cat_name',
                children:'children'
            },
            // 级联选择框双向绑定到的数组
            selectedCateKeys:[],
            // 被激活的页签名字 
            activeName:'many',
            // 动态表格
            manyTableData:[],
            // 静态
            onlyTableData:[],
            // 控制对话框隐藏、显示
            addDialogVisible:false,
            // 添加参数的表单数据对象
            addForm:{},
            // 添加表单验证对象
            addFormRules:{
                attr_name:[
                    {required:true,message:"请输入参数名称",trigger:'blur'},
                ]
            },
            // 添加参数的对话框显示与隐藏
            editDialogVisible:false,
            // 修改的表单数据对象
            editForm:{},
            // 修改的表单验证规则
            editFormRules:{
                attr_name:[
                    {required:true,message:"请输入参数名称",trigger:'blur'},
                ]
            },
            
        }
    },
    created(){
        this.getCateList()
    },
    methods:{
        // 获取所有商品分类
        async getCateList(){
            const {data:res} = await this.$http.get('categories')
              if (res.meta.status !== 200){
                return this.$Message.error('获取商品分类失败！')
            }

            this.catelist = res.data
            console.log( this.catelist);
        },
        // 级联选择框选择项变化，触发这个函数
        hangleChange(){
            
            this.getParamsData()

        },
        handleTabClick(){
            console.log(this.activeName);
            this.getParamsData()

        },
        // 获取参数列表数据
        async getParamsData(){
            // console.log(this.selectedCateKeys);
            if(this.selectedCateKeys.length !== 3){
                console.log("2",this.selectedCateKeys);
                this.selectedCateKeys = []
                this.onlyTableData = []
                this.manyTableData = []
                return
            }
            console.log(this.selectedCateKeys);
            // 根据所选分类的Id，和当前所处的面板
            // console.log("sdacsc",this.activeName);
            console.log("属性",this.activeName);
            const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:this.activeName}})
             if (res.meta.status !== 200){
                 console.log(res.meta);
                return this.$Message.error('获取商品列表失败！')
            }
            res.data.forEach(item=>{
               item.attr_vals=item.attr_vals ? item.attr_vals.split(' ') :[]
                // 控制文本框的显示与隐藏
                item.inputVisible = false
                // 文本框里的值
                item.inputValue = ""
            })
            console.log("item.attr_vals",res.data);

            if(this.activeName==='many'){
                this.manyTableData = res.data
            }else{
                this.onlyTableData = res.data
            }
        },
        // 监听添加对话框关闭
        addDialogClosed(){
            this.$refs.addFormRef.resetFields()
            console.log(this.addForm);
        },
        // 点击按钮发送添加信息请求
        addParams(){
            // 验证
            this.$refs.addFormRef.validate(async valid => {
                if(!valid) return
                const {data:res}= await this.$http.post(`categories/${this.cateId}/attributes`,
                {
                    attr_name:this.addForm.attr_name,
                    attr_sel:this.activeName,
                    // attr_vals:''
                })
                if(res.meta.status !== 201){
                    console.log("res 返回",res);
                    return this.$message.error('添加参数失败')
                }
                this.$message.success('添加参数成功')
                this.addDialogVisible=false
                this.getParamsData()
            })
        },
        // 点击展示修改对话框
        async showEditDialog(attr_id){
            // 查询当前参数信息的ID
            console.log("attr_id",attr_id);
            const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`,
                {params:{attr_sel:this.activeName}}
            )
            console.log(res);
            if(res.meta.status!==200){
                
                return this.$message.error('获取参数信息失败')
            }
            this.editForm = res.data
            console.log(this.editForm);
            this.editDialogVisible=true
        },
        // 重置修改的表单
        editDialogClosed(){
            this.$refs.editFormRef.resetFields()
        },
        
        // 确认提交校验  修改参数信息
        editParams(){
            this.$refs.editFormRef.validate(async valid=>{
                if(!valid) return
                const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
                {attr_name:this.editForm.attr_name,
                attr_sel:this.activeName,
                })
                console.log('res',res);
                if(res.meta.status!==200){
                    return this.$message.error('修改参数提交失败')
                }
                this.$message.success('修改参数成功')
                this.getParamsData()
                this.editDialogVisible = false 
            })
        },
        // 根据ID删除参数项
        async removeParams(attrid){
            const confirmRestful= await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            console.log(confirmRestful);
            if(confirmRestful !== 'confirm'){
                console.log('con',confirmRestful);
                return this.$message.info('已取消删除!')
            }
            // 删除的业务逻辑
            const {data:res} =await this.$http.delete(`categories/${this.cateId}/attributes/${attrid}`)
            if(res.meta.status !==200){
                return this.$message.error('删除参数提交失败')
            }
            this.$message.success('删除参数成功')
            this.getParamsData()
        },
        // 文本框输入或按下enter
        async handleInputConfirm(row){
            console.log('row',row);
            
            if(row.inputValue.trim().length === 0){
                row.inputValue = ''
                row.inputVisible = false
                return 
            }
            // 没有return,则证明输入的内容，需要做后续处理
            row.attr_vals.push(row.inputValue.trim())
            row.inputValue = ''
            row.inputVisible = false
            console.log(row.attr_vals);
            this.saveAttrvals(row)
           
        },
        // 保存标签
        async saveAttrvals(row){
             // 发起请求,保存
            const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,
            {
                attr_name:row.attr_name,
                attr_sel:row.attr_sel,
                attr_vals:row.attr_vals.join(' '),
            })
            console.log('res',res);
            
            if(res.meta.status !==200){
                return this.$message.error('添加标签失败')
            }
            this.$message.success('修改标签成功')
        }
        ,
        showInput(scope){
            scope.row.inputVisible = true
            this.$nextTick(_ => {
                this.$refs.saveTagInput.$refs.input.focus();
            });
        },
        // 删除对应标签参数
        handleClose(i,row){
            // 本质是删除数组内的数据 会更新数组内的数据
            row.attr_vals.splice(i,1)
            this.saveAttrvals(row)
        }
    },
    computed:{
        // 如果按钮需要被禁用，则返回true 
        isBtnDisabled(){
            if(this.selectedCateKeys.length !==3){
                return true
            }
            return false
        },
        // 当前选中的三级分类ID
        cateId(){
            if(this.selectedCateKeys.length === 3){
                return this.selectedCateKeys[2]
            }
            return null
        },
        // 动态计算标题的文本
        titleText(){
            if(this.activeName === "many"){
                return '动态参数'
            }
            return '静态属性'
        },
        



    }
}
</script>

<style lang="less" scoped>
    .cat_opt{
        margin: 15px 0;
    }
    .el-tag {
        margin-right: 10px;
    }
    .input-new-tag {
        width: 120px;
    }
</style>